"The old cast iron buildings died out. I'm not really sure whether the new skyscrapers killed them, or the new aesthetics" One of the characteristics of architecture is that it has to keep up with the advances of technology and try to never be obsolete. That's what I think happened to iron buildings; when steel came out as a new innovated material, it became the most popular material immediately, leaving iron behind. Nowadays, we can see this happen frequently due to the speed which technology advances.
"The old cast iron buildings died out. I'm not really sure whether the new skyscrapers killed them, or the new aesthetics"
One of the characteristics of architecture is that it has to keep up with the advances of technology and try to never be obsolete. That's what I think happened to iron buildings; when steel came out as a new innovated material, it became the most popular material immediately, leaving iron behind. Nowadays, we can see this happen frequently due to the speed which technology advances.